Blade-fastening.



7 0 9 1 .L 00 G E D D E. T N E T A P mm N T 8 S A F 0 3 L B 7 4 m 5 7 8 o N APPLIOATION FILED OUT. 29, 1908. RENEWED KAY 27, 190%..

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. 4 E3111 \fWITNESSES: Z, MWENTOR ATTORNEY.

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.li OIIMAN C. B ASSETT, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO ALLIS-GEIALMERS COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION. OF NEW JERSEY.

BLADE-FASTENING.

Patented Dec. 31 1907.

Amman filed October 29,1906, S erial No. 341.077. Renewed May 2'7, 1907- Serial lilo. 375856.

pelled engines, or the blades 9f fans or pumps for propellingfluid, and generally it relates to a fastening means which is capable of being used in any relation where it is desirable to firmly secure to a member a plurality of similarly associated elements.

The term blade as used in this specification and in the claims is used in the generic sense to include any equivalent elements which it might be desirable to secure to a member in a similar manner and is not intended to restrict this invention to any s eciiic art or machine, the term blade being used for convenience as this invention is particularly well suited ,for use in the construction of steam turbines.

The purpose of this invention is to provide a simple, strong and reliable construction for the purpose described. V

In the drawings which accompany this specification and form a part thereof and on which the same reference characters are used to designate the same elements Wherever they may a ear in each of the several views and which ill iistrate embodiments of this invention,Figure 1 is a plan viewof a fragment of a blade-carrying member with blades secured therein, the blades being shown in section. Fig. 2 is a sectional elevation of the parts as shown by Fig. 1. Fig. 3 is a plan view of a fragment of a blade-carrying mem her with blades secured therein, the blades being shown in section. Fig. dis a sectional elevation of the parts as shown by Fig. 3,

4 5 taken-on the line,aa of Fig. 3.

The blade-carrying'member 1 is provided with a recess 2, one side of said recess being undercut, as at 3, and ada ted to receive a projection 4 formed on the b ade 5. 1

The numeral 6 designates a blade-holding member which is notched 'to receive the blades, as shown at 7, and the numeral 8 represents a calking strip or member which suitable for fastening the blades of fluid prois inserted in the recess 2 and firmly calked to secure the several parts in place. The wall of the recess adjacent the callnng strip may be provided with a depression or recess9, and'the; blade-holding member 6 may be provided with a correspondlngdd pression or recess 10', into which depressions the material ofthe calking strip 8 is adapted to be forced, thereby locking the parts positively against relative movement.

In Figs. 3 and 4 the blade-holding member 6 is shown as provided with elongated, diaga onally extended slots or notches 11 which are adapted to receive the roots 12 of the blades 5, and in each of the forms illustrated the blade-holding member 6 is provided adjacent to said notches with a recessed portion to receive the projections 4 on the blades.

In the construction as shown by Figs. 8 and 4, the undercut portionin the recess 2 is sufliciently large to accommodate not only the projections 4 on the feet of the blades, but also a portion 13 of the blade-holding member'fi which projects beyond the blades and enters said recess;

In the construction as shown by Figs. 1 and 2, the blade-holding member .6 is provided with notches which are substantially triangular in shape as viewed in plan, and it will be noticed by reference toFig. 1 that a small vacant space is left with this construction when the parts are fully assembled. As shown by Fig. 1, the roots 12 of the blades in this construction are bent at a considerable angle as compared with the rest of the blade so as to lie snugly both against the edge of the blade-holding member 6, and also against the wallof the recess 2.

As shown by Figs. 3 and 4, the lower-parts of the blades are bent so as tobe substantially flat, and the roots of said blades are adapted to impinge against'the wall of the recess 2 and be retained thereagainst viith the projections thereon seated in the recess I of said wall in a manner'similar in a general way to that disclosed by Fig. 1.-

It will be'apparent from the above description that this invention provides a very simple, strong and eflicient method of fastening in blades, as the'blades being hooked into a recess formed in the wall of the recess2 and hearing a ainst a wall of said recess, are es ecially wel positioned to avoid, any distortion which might otherwise result from the pressure exerted by the member 8 While it is being calked into place.

What I claim is, f 1. The combination with a blade-carrying member, provided With a recess a side of which is undercut, blades provided with projections adapted to be received Withinthe undercut portion of said side, a blade-holdwing member provided With notches seated in the recess of said blade-carrying member,

"which is undercut, blades .undercut portion of. said side, a bladeholding member provided with notches seated in the recess of said blade-carrying member, said blade-holding member being recessed adjacent said notches to. receive projections I on the blades, and means to secure s'ai'd I 3. The combination With blades and blade-holding member in the recess of said blade-carrying member.

a blade-carrying member, provided with a Whichis undercut, lades provided with projections adapted to be received Within the undercut portion of said side, a blade-hold ing-member provided With notches seated in the recess of said blade-carrying member, said. blade-holding member being recessed adjacent said notches to. receive pro'ections on the blades and being provided Wit a projection adapted to engage with said side within the undercut portion thereof, and

recess a side of means to'secure said blades and blade-holding member'in the recess of said blade-carryin member.

n testimony whereof, I afiix my in the presence of two Witnesses.

NORMAN C. BASSETT.

signature Witnesses:

FRANK E. BENNETT, JOHN OLSEN. 

